Mastering the Agnes Tachyon Build for Medium Distance Wins

Agnes Tachyon stands out in Uma Musume: Pretty Derby as a high-performance tactical runner with a distinct focus on Medium-distance turf racing. Her character design, centered around a "mad scientist" persona, perfectly mirrors her gameplay: calculated, efficient, and explosive in the final stretch. Successfully training Tachyon requires more than just raw speed; it demands a synergy between her unique stamina recovery mechanics and her elite speed growth rates.

To maximize her potential, a build must leverage her 20% Speed and 10% Guts growth rates while compensating for her inherent stamina gaps during longer Medium-distance races. This guide details the optimal stat distributions, support card configurations, and skill priorities based on extensive testing within the URA Finals and specialized scenario modes.

Core Stats and Growth Logic

Agnes Tachyon’s growth distribution is one of the most favorable for Medium-distance specialists. The 20% bonus to Speed allows her to reach competitive caps (1000+) much earlier than her rivals, such as Daiwa Scarlet or Vodca. However, the 10% Guts bonus is often viewed as a "trap" stat; while it helps in the final spurt, focusing too heavily on Guts training can lead to deficiencies in Power and Wit.

Primary Stat: Speed

Speed remains the undisputed priority. For a successful URA run, aiming for a Speed stat between 800 and 1000 is the baseline. In more competitive PvP environments, this should push toward the 1200 cap. Tachyon relies on her top-end velocity to maintain a "Leader" (Pace Chaser) position, ensuring she is close enough to the front to activate her unique skill during the final corners.

Secondary Stats: Power and Wit

Power is essential for her positioning. As a Leader-style runner, Tachyon needs enough Power (aim for 500–600) to maneuver around the pack when transitioning from the middle leg to the final straight. Without sufficient Power, she risks getting "boxed in" by End Closers or other Pace Chasers.

Wit (Wisdom) serves a dual purpose for Tachyon. First, it increases the activation rate of her recovery skills, which is vital because her base stamina is often lower than average. Second, it improves her "racing intelligence," allowing her to choose better lines through corners. A target of 400–500 Wit is recommended for consistent performance.

The Stamina Efficiency Model

Tachyon’s unique skill, Introduction to Physiology (and its upgraded version U=ma²), restores stamina during the second half of the race. This allows her to run Medium races with approximately 10–15% less raw Stamina than other horse girls. For a 2000m–2400m race, 450–500 Stamina is usually sufficient, provided she has at least one additional Gold recovery skill.

Optimal Support Card Configurations

The goal of your support deck is to capitalize on Tachyon's Speed growth while providing the Skill Points (SP) necessary for her tactical skills.

The "Standard Efficiency" Deck (3 Speed / 1 Stamina / 1 Power / 1 Wit)

This is the most balanced loadout for players aiming for consistent wins.

• 3 Speed Cards: These are the engine of the build. Kitasan Black (SSR) is the premier choice here due to its high friendship bonus and "Pro-active" skill hints. Nishino Flower (SSR) is another excellent pick for the "Early Speed" bonuses.
• 1 Stamina Card: Super Creek (SSR) is almost mandatory for the "Pure Heart" (Maestro) skill, which provides the most reliable stamina recovery in the game.
• 1 Power Card: Vodka (SSR) or Oguri Cap (SSR) provide excellent power training bonuses and skills that help with overtaking.
• 1 Wit Card: Fine Motion (SSR) stands as the top-tier choice for its "Speed Star" skill, which is tailor-made for Leader-type runners like Tachyon.

The F2P/Budget Friendly Setup (3 Speed / 2 Wit / 1 Friend)

For players with limited SSR options, focusing on Wit training can be more efficient as it restores energy, allowing for more frequent training sessions.

• Speed: Use SR cards like Sweeps Tosho (for the "One-Way" event) and King Halo.
• Wit: SR Maruzensky or SR Nice Nature provide decent stat gains and useful hints for Medium-distance racing.
• Friend: Tazuna (SSR) or Kashiwamoto Rico can help manage motivation and energy, reducing the RNG of failed training sessions.

Critical Skills for Agnes Tachyon

Skills are the "experimental variables" that determine Tachyon's success. Because her unique skill triggers in the final corner, you should prioritize skills that facilitate getting to that position and staying there.

Unique Skill: Introduction to Physiology / U=ma²

• Mechanic: Restores endurance moderately when conserving energy on a corner in the second half of the race.
• Observation: In our testing, this skill triggers most reliably when Tachyon is in the top 30% to 70% of the pack. If she is too far ahead (running as a Runner/Escape) or too far behind, the activation logic can fail.

Gold (Rare) Skills to Prioritize

1. Circular Professor (Corner Adept): Obtained from Kitasan Black SSR. This improves her speed on corners, which synergizes perfectly with her unique skill activation timing.
2. Maestro of the Arc (Corner Recovery): Obtained from Super Creek SSR. This is the gold standard for stamina. It ensures that even if her unique skill triggers late, she won't "sink" before the finish line.
3. Speed Star: Obtained from Fine Motion SSR. This increases her speed during final corners, allowing her to slingshot past the front runners.

Tactical and Debuff Skills

Tachyon can also act as a "Disruptor" thanks to her intelligence-based skill set.

• Tether (Medium): This slows down the runners in front of her during the final leg. It is a fantastic "come-from-behind" insurance policy.
• Leader’s Pride: Increases her speed when someone tries to overtake her, helping her maintain the Leader position.

Step-by-Step Training Walkthrough

Training Agnes Tachyon requires balancing her "Scientific Pursuit" (high-intensity training) with the reality of her race schedule.

Junior Year: The Foundation

The primary objective in the first year is not stats, but Bonding. You need to trigger "Friendship Training" (Rainbow bars) as soon as possible.

• Focus: Follow the support cards. If 3 or more cards are on one training type (especially Speed or Wit), prioritize that.
• Target: Aim for 200–250 Speed and at least 150 in Stamina and Power by the end of the Debut race.
• Race Schedule: Stick to the required Debut race. Use the remaining turns to build bonds.

Classic Year: The Stamina Check

This year contains the Satsuki-sho and the Tokyo Yushun (Japanese Derby). These are Medium races where Tachyon excels, but you must also prepare for the Kikkasho (3000m) if you intend to run the Triple Crown route.

• The Kikkasho Dilemma: Tachyon has a "B" aptitude for Long distance. To win the Kikkasho, you either need to inherit Long distance factors to bring it to "A" or have at least 400 Stamina plus a Gold recovery skill.
• Summer Camp: Spend all four turns on whatever stats are lagging. Usually, this is Power or Wit. Avoid resting during camp unless energy is below 10%.
• Target: By the end of the Classic year, Speed should be 550+, and Stamina should be 350+.

Senior Year: The Victory Lap

The final year focuses on the Autumn Tenno-sho and Arima Kinen.

• Strategy: This is where you maximize Speed. Friendship training in Speed should be taken almost every time it appears.
• Skill Points: Participate in a few G1 races outside of the required schedule (like the Takarazuka Kinen) to farm SP. You will need roughly 1200–1500 SP to buy all your core Gold skills.
• Target: Speed 850–1000, Power 600, Wit 500, Stamina 500.

Inheritance and Factor Selection

Inheritance (Legacies) is the only way to fix Tachyon's weaknesses before the race begins.

Distance Aptitude

Tachyon is naturally "A" in Medium but "B" in Long. Many of her career races are Long-distance. We strongly recommend using parents that provide at least 4 Long-distance stars to upgrade her aptitude to "A". This significantly reduces the stamina drain during the Kikkasho and Arima Kinen.

Stat Factors

• Power Factors: Since Tachyon’s growth doesn't favor Power, bringing 9 or 18 stars of Power from parents can allow you to focus almost entirely on Speed and Wit training without falling behind in positioning strength.
• Ura Scenario Factors: If available, these provide massive Speed and Stamina boosts during the inheritance events in Year 2 and Year 3.

Recommended Parents

• Tokai Teio: Her unique skill Step is a great inheritance for Tachyon, providing a final spurt speed boost.
• Daiwa Scarlet: Offers great Medium-distance and Leader-type factors.
• Mejiro McQueen: Her unique skill provides a speed boost on corners, which aligns with Tachyon's tactical window.

Troubleshooting Your Build

Even with a perfect plan, RNG can disrupt a Tachyon run. Here is how to handle common issues:

Low Stamina Warnings

If your Stamina is below 300 going into the Classic year, stop Speed training and focus on Stamina or Wit (if using a Stamina-heavy Wit card). Buying a "Blue" recovery skill early is a valid "stop-gap" measure.

High Failure Rates

Tachyon’s events sometimes offer high-risk, high-reward choices (her "Experiments"). If you are on a high-stat run, choose the safe options. If you are behind the curve, taking the "Medicine that makes you faster" can save a run, but be prepared for the "Nightless" or "Lazy" status effects.

Getting Blocked (The "Wall" Issue)

If Tachyon consistently finishes 4th or 5th despite high Speed, your Power is too low. In the next run, swap one Speed card for an additional Power card or prioritize "Maneuvering" skills like Tactical Reach or Vertical Jump.

Summary of the Ideal Build

To summarize, the most effective Agnes Tachyon is a Medium-distance Leader who utilizes high Wit to trigger mid-race recovery, saving her massive Speed for a dominant final corner transition.

Frequently Asked Questions (FAQ)

Can Agnes Tachyon run Long distance races?

Yes, but she requires significant investment. You must raise her Long aptitude to "A" via inheritance and aim for 700+ Stamina. Her unique skill helps, but it isn't enough to carry her through a 3200m race like the Tenno-sho (Spring) without dedicated Stamina support cards.

Is "Between" (Sashi) strategy better than "Leader" (Preceding)?

While Tachyon has a "B" aptitude for Between, Leader is generally more stable. Leader allows her to stay closer to the front, which reduces the Power requirement needed to push through a dense pack of runners. Between requires much higher Power and Guts to be effective.

What is the best Skill to buy first?

Always prioritize Corner Recovery or Maestro of the Arc. Stamina failure is the #1 reason for losing races in the Classic year. Once your stamina is secured, move on to Speed-enhancing skills like Circular Professor.

Why does my Tachyon keep failing training?

This is often due to low Motivation or Energy management. Use the "Rest" command or visit the Shrine (Health/Outing) if your energy is below 50%. Tachyon's unique events can also lower her health, so keep a close eye on the "Failure Rate" percentage—never train if it's over 10-15% unless you are desperate.

By following this scientific approach to her training, you can ensure that Agnes Tachyon lives up to her reputation as the "Phantom Triple Crown" winner, dominating the turf with calculated precision.